Which Statement Best Reflects Accurate Information About Children's Sleep During

Which statement best reflects accurate information about children's sleep during middle childhood?

A) The amount of sleep children need appears to be consistent across all cultures.
B) The quality of sleep steadily improves throughout middle childhood.
C) The "optimal" amount of sleep appears to differ across cultures.
D) The "optimal" amount of sleep in middle childhood is greater than any other time in the lifespan.
E) Children's sleep patterns appear to remain consistent throughout childhood and adolescence.